What is the interpretation of the slope β1\beta_1β1 in the semi-log model ln(Y)=β0+β1X+ϵ\ln(Y) = \beta_0 + \beta_1 X + \epsilonln(Y)=β0+β1X+ϵ?
A 1-unit increase in XXX is associated with a β1\beta_1β1 unit increase in YYY.
A 1-unit increase in XXX is associated with a 100β1100 \beta_1100β1 percent increase in YYY.
A 1-percent increase in XXX is associated with a β1\beta_1β1 percent increase in YYY.
A 1-percent increase in XXX is associated with a β1\beta_1β1 unit increase in YYY.